Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Andrew D. Collord"'
Publikováno v:
Journal of the American Chemical Society. 141(1)
Molecular inks based on dimethyl sulfoxide, thiourea (TU), and metal salts have been used to form high optoelectronic quality semiconductors and have led to high power conversion efficiencies for solution-processed photovoltaic devices for Cu2ZnSn(S,
Autor:
Hugh W. Hillhouse, Andrew D. Collord
Publikováno v:
Chemistry of Materials. 28:2067-2073
It has previously been shown that substitution of germanium for tin in Cu2ZnSn(S,Se)4 provides a means to change the band gap. Here, we show that Ge substitution can also be used to improve carrier collection and decrease the open-circuit voltage def
Autor:
Andrew D. Collord, Hugh W. Hillhouse
Publikováno v:
Solar Energy Materials and Solar Cells. 141:383-390
The sintering of nanocrystals to form a bulk film is a promising route for the production of low cost Cu2ZnSn(S,Se)4 solar cells. However, very little is known about how the synthesis of the nanocrystals impacts the properties of the sintered film or
Autor:
Andrew D. Collord, Hugh W. Hillhouse
Publikováno v:
Chemistry of Materials. 27:1855-1862
The ability to reproducibly synthesize nanocrystal (NC) inks with precisely controlled compositions is essential for making efficient kesterite solar cells from NCs. Here we present the results of a study on Cu–Zn–Sn–S NCs in which different pa
Autor:
C. Jeffrey Brinker, Helen K. Baca, Jin Wang, Fred L. Garcia, Bryan Kaehr, Michael P. Tate, Hugh W. Hillhouse, Joseph Strzalka, Andrew D. Collord, Constantine Y. Khripin, Darren R. Dunphy, Zhang Jiang
Publikováno v:
Chemistry of Materials. 23:2107-2112
The fabrication of nanostructured films possessing tricontinuous minimal surface mesophases with well-defined framework and pore connectivity remains a difficult task. As a new route to these structures, we introduce glycerol monooleate (GMO) as a te
Publikováno v:
ECS Transactions. 28:73-77
We have demonstrated a novel microfluidic technique for aqueous media, which uses super-hydrophobic materials to create microfluidic channels that are open to the atmosphere. We have demonstrated the ability to perform traditional electrokinetic oper
Autor:
Michael P. Tate, Ralf Köhn, Jin Wang, Eric C. Carnes, Michael Sprung, Bernd M. Smarsly, Helen K. Baca, Darren R. Dunphy, C. Jeffrey Brinker, Todd M. Alam, Hugh W. Hillhouse, Andrew D. Collord
Publikováno v:
Langmuir. 25:9500-9509
The nanostructure of silica and hybrid thin film mesophases templated by phospholipids via an evaporation-induced self-assembly (EISA) process was investigated by grazing-incidence small-angle X-ray scattering (GISAXS). Diacyl phosphatidylcholines wi
Autor:
Darren R. Dunphy, Jiri Rathousky, Ozlem Sel, Andrew D. Collord, Bernd M. Smarsly, Torsten Brezesinski, Sebastien Sallard
Publikováno v:
Advanced Functional Materials. 17:3241-3250
Silica thin films with variable pore hierarchy (different combinations of small meso-, large meso-, and macropores) were produced via evaporation induced self-assembly in a one-pot synthesis. A suitable block copolymer and an ionic liquid served as p
Autor:
Benjamin W. Krueger, Sarah M. Vorpahl, David S. Ginger, Hao Xin, Alexander R. Uhl, Hugh W. Hillhouse, Ian L. Braly, Andrew D. Collord
Publikováno v:
Physical Chemistry Chemical Physics
Passive grain boundaries (GBs) are essential for polycrystalline solar cells to reach high efficiency. However, the GBs in Cu2ZnSn(S,Se)4 have less favorable defect chemistry compared to CuInGaSe2. Here, using scanning probe microscopy we show that l
Autor:
Andrew D. Collord, Hugh W. Hillhouse
Publikováno v:
2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC).
Group-I dopants are known to benefit Cu(In,Ga)Se2. Although the exact mechanism is still debated, Na has been shown to improve a variety of device parameters. Due to the similarities between chalcopyrites and kesterites, it is believed that group-I d